Motion-transmitting device for looms



A. SAGAR MOTION TRANSMITTING DEVICE FOR LOOKS May 5, 1931.

Filed Sept. 12. 1930 3 Sheets-Sheet. 1

INVENTOR. ALBERT SAGAR, BY 6% A TTORNE Y.

May 5, 1931. A, SAGAR 1,803,509

MOTION TRANSMITTING DEVICE FOR LOOMS Filed Sept. 12, 1930 3 Sheets-Sheet. 2

INVENTOR] ALBERT 54am,

A TTORNE Y.

May 5, 1931. A. SAGAR MOTION TRANSMITTING DEVICE FOR LOOKS F'iled Sept.

12. 193 3 Sheets-Sheet. 3

INVENTOR. A1 Bf/PT SAG/1R, BY

ATTORNEY.

Patented May 5, 1931,

UNITED STATES PATENT OFFICE ALBERT sAGhn, on SLATER, SOUTH CAROLINA MOTION-TRANSMITTING DEVICE FOR LOOMS Application filed September 12, 1930. Serial No. 481,548. 4

desired dwell. The arrangement allows of the use of a larger shuttle or smaller shed at back centre. which to change the bobbin, shuttle, or box, etc., at front centre, with a consequent increase in speed, with the result that improved weaving is obtainable.

The motion transmitting device is also adapted for connection with the rocker arm of a dobby head. The use of the device in connection with the dobby head eliminates the shed closing upon the shuttle before it is clear, and also opens the shed before the shuttleenters, giving the top and bottom latches of the dobby head more time in which to connect or disconnect with the knives.

. In the accompanying drawings, forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a plan view of the motion transmittin device, showing the same connection with t e lay sword of the loom,

Figure 2 is a side elevation of the same, showing the cranks in the rear position,

Figure 3 is a perspective view of the crank shaft, parts broken away,

Figure 4 is a side elevation of the device,

showing the cranks in the raised position,

Figure 5 is a similar view, showing the cranks in the forward position,

Figure 6 is a similar View, showing the cranks in the lowered position,

Figure 7 is a side elevation of the motion transmitting device embodying my invention, connected with the rocker-arm of a dobby head, the eccentric pins being in the central position between the highest and lowest posi- .50 tions,

It also affords more time in.

Figure 8 is a similar view, with the eccentric pins in the uppermost position, and

Figure 9 is an end elevation of the cam shaft and associated elements.

In the drawings, wherein for the purpose of illustration, are shown preferred embodiments of my invention, attention being called first to Figures 1 to 3, inclusive, the numeral 10 designates the lay'sw'ord of a loom, having a bracket 11 rigidly secured thereto, as shown.

The motion'transmitting device embodies a horizontally arranged crankshaft 12, driven by any suitable means. This crankshaft has a pair of cranks l3 and 14, crank 13 being the same length as crank 14, and both cranks extending radially in the same direction, and being radially angularly disposed. Crank 13 carries an eccentric pin 15, and the crank 14 carriesan eccentric pin 16, the inner ends of these pins being rigidly connected by a crank 17, extending transversely of the cranks 13 and 14. The pins 15 and 16 are both eccentric with relation to the axis of rotation of the crankshaft 12, both disposed upon the same. side of the crank shaft, and spaced the same distances from the axis of rotation of the crank shaft. The cranks 13 and 14 and their pins 15 and 16 are arranged at an oblique angle, as more clearly illustrated in Figure 2.

A pitman arm 18 is pivotally connected so with the eccentric pin 15 and a pitman arm 19 is pivotally connected with the pin 16. The pltman arm 18 is pivotally connected with the upper end of a link'20, by means of a pin 21, and the pitman arm 19 is pivotally connected with the lower end of the link 20, by means of a pin 22, this pivotal connection being, preferably, longitudinally adjustable upon the link 21, for regulating the dwell of the lay sword as it approaches the end of its stroke in either direction. The link 20 is pivoted at its center'with the bracket 11, by means of a pivot or pin 23, and the pivots 21 and 22 are equi-distantly spaced. from the pivot 23.

In view of the foregoing description, it is obvious that as the crank shaft 12 rotates, the eccentric pins 15 and 16 turn with it, imparting longitudinal motion to the pitman arms 18 and 19. These pitmanarms shift the links which causes the back and forth swinging motion of the lay sword. When thelay sword is shifted to the closed or open position, the link 20 is substantially vertically arranged, and further turning movement of the crank shaft will turn the link 20 upon its pivot before bodily shifting the nection with any particular type of dobby head or rocker arm.

The numeral 24 designates the dobby arm mounted upon a rocker shaft 25. The rocker arm 24 is provided with a longitudinal slot 26, as shown.

The numeral 27 designates a cam shaft, carrying a crank 28. An eccentric pin 29 is rigidly mounted upon the outer end of the crank 28, and this eccentric pin has rigid connection with a circumferentially extending segment 30, having an eccentric pin 30' rigidly mounted thereon. The eccentric pins 29 and 30 are disposed at the same radial distance from the axis of rotation of the cam shaft 27, but these eccentric pins are circumferentially spaced. The pins 29 and 30 are also disposed at an oblique angle.

A coupling 31 is pivotally mounted upon the eccentric pin 30 and a coupling 32 is pivotally mounted upon the eccentric pin 29. Pivotally connected with the coupling 31 by means of a pin 33, or the like, is a pitman rod or arm 34. A pitman arm or rod 35 is pivotally connected with the coupling 32, as shown at 36.

The numeral 37 designates a link supported by a headed pin 38, arranged centrally thereof, and this pin is pivotally mounted within the slot 26. A coupling element 39 is pivotally connected with one end of the link 37, by means of a pin 40 and this coupling element has pivotal connection at 41 with a coacting coupling element 42, longitudinally adjustably mounted upon the upper end of the pitman arm or rod 34. A coupling element 43 is pivotally connected with the opposite end of the link 37, by means of a pin 44, and this coupling element is pivotally connected with a co-acting coupling element 45, by means of a pin 46. The coupling element 45 is longitudinally adjustably mounted upon the pitman rod or arm 35. The pivot pins 40 and 44 are equi-distantly spaced from the pivot pin 38, and are prefimparts a turning movement of the link 37 upon its pivot, before bodily shifting the same, thus effecting the dwell of the rocker arm.

It is to be understood that the forms of my invention, herewith shown and described, are to be taken as preferred examples of the same, and that various changes in the shape, size and arrangement of parts, may be re sored to, without departing from the spirit of my invention, or the scope of the subjoined claims.

Having thus described my invention, I claim 1. The combination with the movable element of a loom, of a link pivoted between its ends to said movable element, a crank shaft having eccentric pins disposed at an oblique angle, and pitman arms pivotally connected with the eccentric pins and with the link upon opposite sides of the pivot of the link.

2. The combination with the movable element of a loom, of a link pivoted between its ends with said movable elements, a crank shaft having eccentric pins disposed at an oblique angle, and pitman arms pivotally connected with the eccentric pins and with the ends of the link.

3. The combination with the lay sword of a loom, of a link pivoted between its ends with the lay sword, a crank shaft having eccentric pins spaced the same distances from its axis of rotation said pins being disposed at an oblique angle, pitman arms pivotally connected with the eccentric pins and pivotally connected with the link upon opposite sides of its pivot.

4. The combination with the lay sword of a loom, of a link pivoted between its ends with the lay sword, a crank shaft having eccentric pins disposed upon the same side of its axis of rotation and arranged the same distances from such axis said pins being disposed at an oblique angle, and pitman arms pivotally connected with theeccentric' pins and with the ends of said link.

5. The combination with the rocker arm of a dobby head, of a link pivotally connected between its ends with the rocker arm, a crank shaft having eccentric pins disposed at an oblique angle, and pitman arms pivotally connected with the eccentriepins and with the link upon opposite sides of its pivot.

6. The combination with the rocker arm of a dobby head, of a link pivoted between its ends with said arm, a crank shaft having eccentric pins which are disposed upon the same side of the axis of rotation of saidshaft and arranged at an oblique angle, and pitman arms pivotally connected with the eccentric pins and with the end portions of said link. Y

7. The combination with the rocker arm of a dobby head, of a link pivoted between its ends with said arm, a crank shaft. having a crank, eccentric pins carried by the crank and circumferentially spaced and disposed at an oblique angle, and pitman arms pivotally connected with the eccentric pins and with the-link upon opposite sides of its pivot. 8. The combination with the rocker arm of a dobby head, of a link pivoted between its ends with said arm, a crank shaft having a radialcrank, a circumferential segment disposed at the outer end of the crank, an eccentric pin connecting the segment and crank and disposed at an oblique angle, a second eccentric pin carried by the segment and g5 spaced from the first named pin, and pitman arms pivotally connected with the pins and with the link upon opposite sides of the pivot of said link.

In testimony whereof I aflix my si 'ature. so ALBERT SA AR. 

